The death of Queen Elizabeth II is being mourned in Britain and across the world. The country’s longest-reigning monarch died Thursday at age 96.

Large crowds gathered outside Buckingham Palace in central London, while tributes pour in from across the country and the world. Fears had been growing about the queen’s health as the royal family rushed to Scotland to be by her side after Buckingham Palace said she had been placed under medical supervision.

Few Britons have known another monarch, so the end of Elizabeth’s reign after more than 70 years will thrust the royal family — and Britain — into days of mourning and an uncertain new era.

The country’s new king, who will be known as King Charles III, has released a statement and will address the nation Friday.

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